Re: [Xen-devel] xen not able to use total physical memory present in the system (192GB)

[Konrad Rzeszutek Wilk <konrad@xxxxxxxxxx>]

On Tue, Sep 11, 2012 at 07:07:00PM +0530, àààààà ààààà  wrote:
> Hi
> 
> I am using xen-4.1.2 with fedora-16 (kernel version 3.1.0.7) as dom0 on
> system having 192GB of RAM.


Can you check /boot/config* | grep XEN_MAX_DOMAIN


> 
> When i booted system xm info shows (total _memory parameter as 192GB and
> free_memory as 25MB) full memory but /proc/meminfo reports 132GB and xm
> list also reports 192GB for dom0
> 
> When I ran first VM with 32GB RAM, xm info started reporting memory for
> dom0 around 132GB and 32GB for VM and cat /proc/meminfo on dom0 reported
> around 100GB. I am able to boot 4 VMs with this setup but 5th VM fails to
> boot with not enough memory.
> 
> 
> ultimately not able to use full system memory ? 60GB went missing from
> memory.

There are also some bug-fixes for this that I've been posting that
I plan to integrate in v3.7.

Are you up for testing them out and to see if they work?
> 
> http://old-list-archives.xen.org/archives/html/xen-devel/2009-07/msg00521.html
> 
> On this thread,
> 
> Jan mentined
> 
> "the hypervisor has been validated to work fine with 1Tb for much longer, it 
> was
> really the Dom0 kernel that had issues when not passing a dom0_mem=
> option".
> 
> I am not using this option "dom0_mem". Is anybody faced any issue like this ?
> 
> 
> Thanks,
> Aniket

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